 import {mapGetters} from 'vuex'
export default{
  computed:{
        ...mapGetters('m_cart',['total'])
      },
      watch:{
        total(){
          this.setBadge()
        }
      },
      onShow() {
  this.setBadge()
      },
      methods:{
        setBadge(){     
          uni.setTabBarBadge({
          index:2,
          text:this.total+''
        })
        }
      
      }
  
}